public async Task ConnectAsync()
{
if (mqttClient == null)
{
mqttClient = new MqttFactory().CreateMqttClient();
}
var mqBuild = new MqttClientOptionsBuilder().WithTcpServer(connectIP, port);
mqoptions = mqBuild.WithProtocolVersion(MQTTnet.Formatter.MqttProtocolVersion.V310).Build();
mqttClient.UseApplicationMessageReceivedHandler(ReceivedHandler);
mqttClient.UseConnectedHandler(ConnectedHandler);
mqttClient.UseDisconnectedHandler(DisconnectedHandler);
Console.WriteLine("开始连接MQTT");
try
{
var mqttConnectResult = await mqttClient.ConnectAsync(mqoptions);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
/// <summary>
/// Converts the connection options to client options.
/// </summary>
public IMqttClientOptions ToMqttClientOptions()
{
MqttClientOptionsBuilder builder = new MqttClientOptionsBuilder()
.WithTcpServer(Server, Port > 0 ? Port : null);
if (!string.IsNullOrEmpty(ClientID))
{
builder.WithClientId(ClientID);
}
if (!string.IsNullOrEmpty(Username))
{
builder.WithCredentials(Username, Password);
}
if (Timeout > 0)
{
builder.WithCommunicationTimeout(TimeSpan.FromMilliseconds(Timeout));
}
if (ProtocolVersion > MqttProtocolVersion.Unknown)
{
builder.WithProtocolVersion(ProtocolVersion);
}
return(builder.Build());
}
public async Task MQTTClientConnect(string URI)
{
MqttClientOptionsBuilder MQOptions = new MqttClientOptionsBuilder();
MQOptions.WithClientId(MQTT_CLIENT_ID);
MQOptions.WithWebSocketServer(URI);
MQOptions.WithProtocolVersion(MQTTnet.Formatter.MqttProtocolVersion.V311);
MQOptions.WithTls();
await mqClient.ConnectAsync(MQOptions.Build()).ConfigureAwait(false);
}
public async Task Connect(string username, string server, int port)
{
var clientOptionsBuilder = new MqttClientOptionsBuilder();
clientOptionsBuilder.WithProtocolVersion((MqttProtocolVersion.V310));
if (!string.IsNullOrWhiteSpace(username))
{
MqttClientCredentials credentials = new MqttClientCredentials();
credentials.Username = username;
clientOptionsBuilder.WithCredentials(credentials);
}
clientOptionsBuilder.WithTcpServer(server, port);
await _mqttClient.ConnectAsync(clientOptionsBuilder.Build());
}
/// <inheritdoc cref="IMqttClientConfigBuilder.UseProtocolVersion" />
public IMqttClientConfigBuilder UseProtocolVersion(MqttProtocolVersion value)
{
_builder.WithProtocolVersion(value);
return(this);
}
private async void Connect_Click(object sender, EventArgs e)
{
if (mqttClient == null)
{
mqttClient = new MqttFactory().CreateMqttClient();
mqttClient.UseApplicationMessageReceivedHandler(new
Action <MqttApplicationMessageReceivedEventArgs>(MqttClient_ApplicationMessageReceived));
mqttClient.UseDisconnectedHandler(new
Action <MqttClientDisconnectedEventArgs>(MqttClient_Disconnected));
mqttClient.UseConnectedHandler(new
Action <MqttClientConnectedEventArgs>(MqttClient_Connected));
}
if (mqttClient.IsConnected)
{
return;
}
status.Text = "Connecting...";
var clientOptionsBuilder = new MqttClientOptionsBuilder();
clientOptionsBuilder.WithProtocolVersion((MqttProtocolVersion)version.SelectedValue);
if (!string.IsNullOrWhiteSpace(username.Text))
{
if (!string.IsNullOrWhiteSpace(password.Text))
{
clientOptionsBuilder.WithCredentials(username.Text, password.Text);
}
else
{
clientOptionsBuilder.WithCredentials(username.Text);
}
}
if (!string.IsNullOrWhiteSpace(clientId.Text))
{
clientOptionsBuilder.WithClientId(clientId.Text);
}
if (useTls.Checked)
{
clientOptionsBuilder.WithTls();
}
if (useWebSocket.Checked)
{
clientOptionsBuilder.WithWebSocketServer(host.Text);
}
else
{
clientOptionsBuilder.WithTcpServer(host.Text, int.Parse(port.Text));
}
if (cleanSession.Checked)
{
clientOptionsBuilder.WithCleanSession(true);
}
else
{
clientOptionsBuilder.WithCleanSession(false);
}
if (setWill.Checked && !string.IsNullOrWhiteSpace(input.TextValue))
{
clientOptionsBuilder.WithWillMessage(BuildMessage());
}
try
{
await mqttClient.ConnectAsync(clientOptionsBuilder.Build());
clientId.Text = mqttClient.Options.ClientId;
}
catch (Exception ex)
{
MessageBox.Show(this, ex.Message);
}
}
public static MqttStatus Connect(string url, MqttConfig config)
{
Guid key = Guid.NewGuid();
try
{
#if DEBUG
IMqttClient client = new MqttFactory().CreateMqttClient(new ConsoleLogger());
#else
IMqttClient client = new MqttFactory().CreateMqttClient();
#endif
var b = new MqttClientOptionsBuilder()
.WithTcpServer(url, config.Port)
.WithKeepAlivePeriod(TimeSpan.FromSeconds(config.KeepAlive))
.WithMaximumPacketSize(Convert.ToUInt32(config.BufferSize))
.WithCommunicationTimeout(TimeSpan.FromSeconds(config.ConnectionTimeout))
.WithCleanSession(config.CleanSession);
if (config.SessionExpiryInterval > 0)
{
b = b.WithSessionExpiryInterval((uint)config.SessionExpiryInterval);
}
if (!string.IsNullOrEmpty(config.ClientId))
{
b = b.WithClientId(config.ClientId);
}
if (!config.SSLConnection)
{
b = b.WithCredentials(config.UserName, config.Password);
}
switch (config.ProtocolVersion)
{
case 310:
b = b.WithProtocolVersion(MqttProtocolVersion.V310);
break;
case 311:
b = b.WithProtocolVersion(MqttProtocolVersion.V311);
break;
case 500:
b = b.WithProtocolVersion(MqttProtocolVersion.V500);
break;
default:
throw new InvalidDataException("Invalid protocol versions. Valid versions are 310, 311 or 500");
}
if (config.SSLConnection)
{
string base64CACert = RSAKeys.GetPlainBase64(config.CAcertificate);
X509Certificate2 caCert = new X509Certificate2(Convert.FromBase64String(base64CACert));
byte[] caBytes = caCert.Export(X509ContentType.Cert);
string base64Client = RSAKeys.GetPlainBase64(config.ClientCertificate);
X509Certificate2 cliCert = new X509Certificate2(Convert.FromBase64String(base64Client), config.ClientCerificatePassphrase);
cliCert = cliCert.CopyWithPrivateKey(RSAKeys.ImportPrivateKey(config.PrivateKey, new PasswordFinder(config.ClientCerificatePassphrase)));
byte[] cliBytes = cliCert.Export(X509ContentType.Pfx);
try
{
var tls = new MqttClientOptionsBuilderTlsParameters
{
SslProtocol = System.Security.Authentication.SslProtocols.Tls12 | System.Security.Authentication.SslProtocols.Tls11 | System.Security.Authentication.SslProtocols.Tls,
UseTls = true,
AllowUntrustedCertificates = true,
IgnoreCertificateChainErrors = true,
IgnoreCertificateRevocationErrors = true,
Certificates = new List <X509Certificate>()
{
caCert, cliCert
},
//CertificateValidationHandler = context => true
CertificateValidationCallback = (certificate, chain, sslError, opts) => true
};
b = b.WithTls(tls);
}
finally
{
caCert.Dispose();
cliCert.Dispose();
}
}
client.UseDisconnectedHandler(async e =>
{
try
{
if (Connections.ContainsKey(key))
{
await Task.Delay(TimeSpan.FromSeconds(config.AutoReconnectDelay));
MqttClientAuthenticateResult reconnectResult = await client.ConnectAsync(b.Build());
SubscribePreviousConnection(key, reconnectResult);
}
}
catch
{
Connections.Remove(key);
client.Dispose();
}
});
MqttClientAuthenticateResult result = client.ConnectAsync(b.Build()).GetAwaiter().GetResult();
MqttClient mqtt = new MqttClient(client, config);
Connections[key] = mqtt;
SubscribePreviousConnection(key, result);
}
catch (Exception ex)
{
return(MqttStatus.Fail(Guid.Empty, ex));
}
return(MqttStatus.Success(key));
}